
/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "Sk64.h"
#include "SkCornerPathEffect.h"
#include "SkGradientShader.h"
#include "SkGraphics.h"
#include "SkImageDecoder.h"
#include "SkKernel33MaskFilter.h"
#include "SkPath.h"
#include "SkRandom.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "SkColorPriv.h"
#include "SkColorFilter.h"
#include "SkTime.h"
#include "SkTypeface.h"
#include "SkXfermode.h"

#include "SkStream.h"
#include "SkXMLParser.h"
#include "SkColorPriv.h"
#include "SkImageDecoder.h"
#include "SkBlurMaskFilter.h"

#ifdef SK_BUILD_FOR_MAC
#import <ApplicationServices/ApplicationServices.h>
SkTypeface* SkCreateTypefaceFromCTFont(CTFontRef fontRef);
#endif

static void setNamedTypeface(SkPaint* paint, const char name[])
    {
    SkTypeface* face = SkTypeface::CreateFromName(name, SkTypeface::kNormal);
    paint->setTypeface(face);
    SkSafeUnref(face);
    }

static uint16_t gBG[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF };

class XfermodesBlurView : public SampleView
    {
        SkBitmap    fBG;
        SkBitmap    fSrcB, fDstB;

        void draw_mode(SkCanvas* canvas, SkXfermode* mode, int alpha,
                       SkScalar x, SkScalar y)
            {
            SkPaint p;
            SkMaskFilter* mf = SkBlurMaskFilter::Create(5, SkBlurMaskFilter::kNormal_BlurStyle, 0);
            p.setMaskFilter(mf)->unref();

            SkScalar ww = SkIntToScalar(W);
            SkScalar hh = SkIntToScalar(H);

            // draw a circle covering the upper
            // left three quarters of the canvas
            p.setColor(0xFFCC44FF);
            SkRect r;
            r.set(0, 0, ww*3/4, hh*3/4);
            r.offset(x, y);
            canvas->drawOval(r, p);

            p.setXfermode(mode);

            // draw a square overlapping the circle
            // in the lower right of the canvas
            p.setColor(0x00AA6633 | alpha << 24);
            r.set(ww/3, hh/3, ww*19/20, hh*19/20);
            r.offset(x, y);
            canvas->drawRect(r, p);

#ifdef SK_BUILD_FOR_MAC
            static const char* gNames[] = { "Arial", "Times", "Courier", "Lucida" };
            for (int j = 0; j < SK_ARRAY_COUNT(gNames); ++j)
                {
                CFStringRef name = CFStringCreateWithCString(NULL, gNames[j], kCFStringEncodingUTF8);
                CTFontRef font = CTFontCreateWithName(name, 0, NULL);
                SkTypeface* face = SkCreateTypefaceFromCTFont(font);
                SkDebugf("%s ct:%p face:%p ats:%p\n", gNames[j], font, face, CTFontGetPlatformFont(font, NULL));
                for (int i = 9; i <= 24; ++i)
                    {
                    CTFontRef newFont = CTFontCreateCopyWithAttributes(font, i, NULL, NULL);
                    SkTypeface* newFace = SkCreateTypefaceFromCTFont(newFont);
                    SkDebugf("size:%d ct:%p face:%p ats:%p\n", i, newFont, newFace, CTFontGetPlatformFont(newFont, NULL));
                    newFace->unref();
                    CFRelease(newFont);
                    }
                face->unref();
                CFRelease(font);
                CFRelease(name);
                }
#endif
            }

    public:
        const static int W = 64;
        const static int H = 64;
        XfermodesBlurView()
            {
            const int W = 64;
            const int H = 64;

            fBG.setConfig(SkBitmap::kARGB_4444_Config, 2, 2, 4);
            fBG.setPixels(gBG);
            fBG.setIsOpaque(true);
            }

    protected:
        // overrides from SkEventSink
        virtual bool onQuery(SkEvent* evt)
            {
            if (SampleCode::TitleQ(*evt))
                {
                SampleCode::TitleR(evt, "XfermodesBlur");
                return true;
                }
            return this->INHERITED::onQuery(evt);
            }

        virtual void onDrawContent(SkCanvas* canvas)
            {
            canvas->translate(SkIntToScalar(10), SkIntToScalar(20));

            if (false)
                {
                SkPaint paint;
                paint.setAntiAlias(true);
                paint.setTextSize(50);
                paint.setTypeface(SkTypeface::CreateFromName("Arial Unicode MS", SkTypeface::kNormal));
                SkSafeUnref(paint.getTypeface());
                char buffer[10];
                size_t len = SkUTF8_FromUnichar(0x8500, buffer);
                canvas->drawText(buffer, len, 40, 40, paint);
                return;
                }
            if (false)
                {
                SkPaint paint;
                paint.setAntiAlias(true);

                SkRect r0 = { 0, 0, 10.5f, 20 };
                SkRect r1 = { 10.5f, 10, 20, 30 };
                paint.setColor(SK_ColorRED);
                canvas->drawRect(r0, paint);
                paint.setColor(SK_ColorBLUE);
                canvas->drawRect(r1, paint);
                return;
                }

            const struct
                {
                SkXfermode::Mode  fMode;
                const char*         fLabel;
                } gModes[] =
                {
                    { SkXfermode::kClear_Mode,    "Clear"     },
                    { SkXfermode::kSrc_Mode,      "Src"       },
                    { SkXfermode::kDst_Mode,      "Dst"       },
                    { SkXfermode::kSrcOver_Mode,  "SrcOver"   },
                    { SkXfermode::kDstOver_Mode,  "DstOver"   },
                    { SkXfermode::kSrcIn_Mode,    "SrcIn"     },
                    { SkXfermode::kDstIn_Mode,    "DstIn"     },
                    { SkXfermode::kSrcOut_Mode,   "SrcOut"    },
                    { SkXfermode::kDstOut_Mode,   "DstOut"    },
                    { SkXfermode::kSrcATop_Mode,  "SrcATop"   },
                    { SkXfermode::kDstATop_Mode,  "DstATop"   },
                    { SkXfermode::kXor_Mode,      "Xor"       },

                    { SkXfermode::kPlus_Mode,         "Plus"          },
                /*{ SkXfermode::kMultiply_Mode,     "Multiply"      },
                { SkXfermode::kScreen_Mode,       "Screen"        },
                { SkXfermode::kOverlay_Mode,      "Overlay"       },
                { SkXfermode::kDarken_Mode,       "Darken"        },
                { SkXfermode::kLighten_Mode,      "Lighten"       },
                { SkXfermode::kColorDodge_Mode,   "ColorDodge"    },
                { SkXfermode::kColorBurn_Mode,    "ColorBurn"     },
                { SkXfermode::kHardLight_Mode,    "HardLight"     },
                { SkXfermode::kSoftLight_Mode,    "SoftLight"     },
                { SkXfermode::kDifference_Mode,   "Difference"    },
                { SkXfermode::kExclusion_Mode,    "Exclusion"     },*/
                };

            const SkScalar w = SkIntToScalar(W);
            const SkScalar h = SkIntToScalar(H);
            SkShader* s = SkShader::CreateBitmapShader(fBG,
                          SkShader::kRepeat_TileMode,
                          SkShader::kRepeat_TileMode);
            SkMatrix m;
            m.setScale(SkIntToScalar(6), SkIntToScalar(6));
            s->setLocalMatrix(m);

            SkPaint labelP;
            labelP.setAntiAlias(true);
            labelP.setLCDRenderText(true);
            labelP.setTextAlign(SkPaint::kCenter_Align);
            setNamedTypeface(&labelP, "Menlo Regular");

            const int W = 5;

            SkScalar x0 = 0;
            for (int twice = 0; twice < 2; twice++)
                {
                SkScalar x = x0, y = 0;
                for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++)
                    {
                    SkXfermode* mode = SkXfermode::Create(gModes[i].fMode);
                    SkAutoUnref aur(mode);
                    SkRect r;
                    r.set(x, y, x+w, y+h);

                    SkPaint p;
                    p.setStyle(SkPaint::kFill_Style);
                    p.setShader(s);
                    canvas->drawRect(r, p);

                    canvas->saveLayer(&r, NULL, SkCanvas::kARGB_ClipLayer_SaveFlag);
                    draw_mode(canvas, mode, twice ? 0x88 : 0xFF, r.fLeft, r.fTop);
                    canvas->restore();

                    r.inset(-SK_ScalarHalf, -SK_ScalarHalf);
                    p.setStyle(SkPaint::kStroke_Style);
                    p.setShader(NULL);
                    canvas->drawRect(r, p);

                    canvas->drawText(gModes[i].fLabel, strlen(gModes[i].fLabel),
                                     x + w/2, y - labelP.getTextSize()/2, labelP);
                    x += w + SkIntToScalar(10);
                    if ((i % W) == W - 1)
                        {
                        x = x0;
                        y += h + SkIntToScalar(30);
                        }
                    }
                x0 += SkIntToScalar(400);
                }
            s->unref();
            }

    private:
        typedef SampleView INHERITED;
    };

//////////////////////////////////////////////////////////////////////////////

static SkView* MyFactory()
    {
    return new XfermodesBlurView;
    }
static SkViewRegister reg(MyFactory);
